Higher Mass Limits

operators of vehicles or combinations running HML on tri-axle groups are accredited under the Mass Management Module of the National Heavy Vehicle Accreditation Scheme (NHVAS), with an accreditation label fitted to the hauling unit

vehicles are fitted with certified road friendly suspension

vehicles are on an authorised HML route.

HML provides a significant increase in the productivity of road freight transport vehicles.

Road friendly suspension

To be eligible for HML, vehicles must be fitted with certified road friendly suspensions. Road friendly suspension systems reduce the impact of laden axles on road pavements and most bridge structures.

Higher mass limits set out under the Heavy Vehicle National Law (HVNL)

Below are standard axle mass limit increases for vehicles fitted with certified road friendly suspensions. Before operating under HML, it is strongly recommended that you check the HML transition notice relevant to the jurisdiction/s you will be operating in to ensure that you conform to potential minor variations from the national policy.

Our interactive online mapping service, the NHVR Journey Planner, can also help you find approved routes for heavy vehicles on the road network.

Access to unauthorised routes

The NHVR coordinates a range of access permit applications from start to finish, liaising directly with road managers (both state and territory road authorities and local government) to manage applications and issue permits. Visit Access applications and forms for permits issued by the NHVR.